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Exam 350-401 topic 1 question 740 discussion

Actual exam question from Cisco's 350-401
Question #: 740
Topic #: 1
[All 350-401 Questions]

Which signal strength and noise values meet the minimum SNR for voice networks?

  • A. signal strength -66 dBm, noise 90 dBm
  • B. signal strength -67 dBm, noise 91 dBm
  • C. signal strength -68 dBm, noise 89 dBm
  • D. signal strength -69 dBm, noise 94 dBm
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Suggested Answer: D 🗳️

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Nickplayany
Highly Voted 1 year, 8 months ago
Selected Answer: D
The correct is D Check below: Generally, a signal with an SNR value of 20 dB or more is recommended for data networks where as an SNR value of 25 dB or more is recommended for networks that use voice applications. A. signal strength -66 dBm, noise 90 dBm=24dB B. signal strength -67 dBm, noise 91 dBm=24dB C. signal strength -68 dBm, noise 89 dBm=21dB D. signal strength -69 dBm, noise 94 dBm=25dB <- Correct
upvoted 18 times
bullett00th
1 year, 8 months ago
Totally agree - min. 25dB - I choose also D
upvoted 4 times
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Burik
Highly Voted 1 year, 6 months ago
Selected Answer: D
None of the answers are correct, they should be as follows: A. signal strength -66 dBm, noise -90 dBm B. signal strength -67 dBm, noise -91 dBm C. signal strength -68 dBm, noise -89 dBm D. signal strength -69 dBm, noise -94 dBm Even if fixed, the answer is D and not B, as -69 -(-94) = 25 which is the recommended SNR for voice applications.
upvoted 8 times
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zbeugene7
Most Recent 6 days, 4 hours ago
Selected Answer: D
Minimum is 25 , D is the only option with a value => 25
upvoted 1 times
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AbdullahMohammad251
2 months, 2 weeks ago
Selected Answer: D
The noise must be negative so that the difference is positive (a negative SNR indicates that the noise dominates the signal, which is unacceptable.) -69 - (-94) = 25 dB
upvoted 1 times
AbdullahMohammad251
2 months, 2 weeks ago
The Options above must be corrected!
upvoted 1 times
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Kan3184
4 months ago
Selected Answer: D
ADMIN, this is unacceptable because there are too many mistakes. Please, fix the mistake. The correct answer is D.
upvoted 1 times
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[Removed]
6 months, 2 weeks ago
Selected Answer: D
D is correct SNR should be at least 25 for Voice and Videos
upvoted 1 times
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IgorLVG
9 months ago
i recommend B: when you use ekahau with cisco standar, the settings are -67dbm as minimum
upvoted 1 times
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eearmani
1 year ago
The minimum recommended wireless signal strength for voice applications is -67 dBm and the minimum SNR is 25 dB.
upvoted 2 times
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Vadkorte
1 year, 3 months ago
None of these choices are correct - "The minimum recommended wireless signal strength for voice applications is -67 dBm and the minimum SNR is 25 dB." https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/116057-site-survey-guidelines-wlan-00.html
upvoted 4 times
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Asombrosso
1 year, 3 months ago
Selected Answer: D
actually, none of the answers are correctly represented
upvoted 3 times
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HarwinderSekhon
1 year, 5 months ago
-25 For Voice -20 for anything else.
upvoted 2 times
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RamazanLokov
1 year, 6 months ago
wrong answers, minus forgotten for noise value
upvoted 2 times
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felix_simon
1 year, 7 months ago
B https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/116057-site-survey-guidelines-wlan-00.html "The minimum recommended wireless signal strength for voice applications is -67 dBm and the minimum SNR is 25 dB."
upvoted 1 times
danman32
1 year, 5 months ago
I just re-read the question. They're only interested in the SNR meeting minimum requirement, so answer is definitely D as it is the only answer that meets the minimum SNR, even if it doesn't meet industry signal strength requirement
upvoted 1 times
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danman32
1 year, 5 months ago
B fits the signal strength requirement, but not the SNR requirement. SNR for B is 24 (-91-(-67)) = 24 So really none of the answers fit. A & B fit the minimum strength requirement But only D fits the SNR minimum requirement but not the strength requirement.
upvoted 2 times
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Humb13g0d
1 year, 8 months ago
Selected Answer: D
D is the correct answer.
upvoted 1 times
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DavideDL
1 year, 9 months ago
Selected Answer: D
Generally, a signal with an SNR value of 20 dB or more is recommended for data networks where as an SNR value of 25 dB or more is recommended for networks that use voice applications https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Signal-to-Noise_Ratio_(SNR)_and_Wireless_Signal_Strength#:~:text=Generally%2C%20a%20signal%20with%20an,networks%20that%20use%20voice%20applications.
upvoted 2 times
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snarkymark
1 year, 9 months ago
Selected Answer: D
Believe correct answer is D, 25
upvoted 2 times
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C (25%)
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